Lamp support arm



FIG. 1 is a side elevation view of the lamp support arm in accordancewith our design, illustrating the environment of the support arm;

FIG. 2 is a top plan view of the lamp support arm in accordance with ourdesign;

FIG. 3 is a front elevation view of the lamp support arm in accordancewith our design;

FIG. 4 illustrates the side elevation view of the lamp support arm inaccordance with our design;

FIG. 5 illustrates the back elevation view of the lamp support arm inaccordance with our design; and,

FIG. 6 illustrates the bottom plan view of the lamp support arm inaccordance with our design.

The right and left elevation view are symmetrical.

The broken line showing of environmental structure is for illustrativepurposes only and forms no part of the claimed design.

The ornamental design for the lamp support arm, as shown and described.